[git/git.git] / git-compat-util.h

#ifndef GIT_COMPAT_UTIL_H
#define GIT_COMPAT_UTIL_H

#ifndef FLEX_ARRAY
#if defined(__GNUC__) && (__GNUC__ < 3)
#define FLEX_ARRAY 0
#else
#define FLEX_ARRAY /* empty */
#endif
#endif

#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))

#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <dirent.h>

#ifdef __GNUC__
#define NORETURN __attribute__((__noreturn__))
#else
#define NORETURN
#ifndef __attribute__
#define __attribute__(x)
#endif
#endif

/* General helper functions */
extern void usage(const char *err) NORETURN;
extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));

extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
extern void set_error_routine(void (*routine)(const char *err, va_list params));

#ifdef NO_MMAP

#ifndef PROT_READ
#define PROT_READ 1
#define PROT_WRITE 2
#define MAP_PRIVATE 1
#define MAP_FAILED ((void*)-1)
#endif

#define mmap gitfakemmap
#define munmap gitfakemunmap
extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
extern int gitfakemunmap(void *start, size_t length);

#else /* NO_MMAP */

#include <sys/mman.h>

#endif /* NO_MMAP */

#ifdef NO_SETENV
#define setenv gitsetenv
extern int gitsetenv(const char *, const char *, int);
#endif

#ifdef NO_UNSETENV
#define unsetenv gitunsetenv
extern void gitunsetenv(const char *);
#endif

#ifdef NO_STRCASESTR
#define strcasestr gitstrcasestr
extern char *gitstrcasestr(const char *haystack, const char *needle);
#endif

#ifdef NO_STRLCPY
#define strlcpy gitstrlcpy
extern size_t gitstrlcpy(char *, const char *, size_t);
#endif

static inline char* xstrdup(const char *str)
{
	char *ret = strdup(str);
	if (!ret)
		die("Out of memory, strdup failed");
	return ret;
}

static inline void *xmalloc(size_t size)
{
	void *ret = malloc(size);
	if (!ret && !size)
		ret = malloc(1);
	if (!ret)
		die("Out of memory, malloc failed");
#ifdef XMALLOC_POISON
	memset(ret, 0xA5, size);
#endif
	return ret;
}

static inline void *xrealloc(void *ptr, size_t size)
{
	void *ret = realloc(ptr, size);
	if (!ret && !size)
		ret = realloc(ptr, 1);
	if (!ret)
		die("Out of memory, realloc failed");
	return ret;
}

static inline void *xcalloc(size_t nmemb, size_t size)
{
	void *ret = calloc(nmemb, size);
	if (!ret && (!nmemb || !size))
		ret = calloc(1, 1);
	if (!ret)
		die("Out of memory, calloc failed");
	return ret;
}

static inline ssize_t xread(int fd, void *buf, size_t len)
{
	ssize_t nr;
	while (1) {
		nr = read(fd, buf, len);
		if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
			continue;
		return nr;
	}
}

static inline ssize_t xwrite(int fd, const void *buf, size_t len)
{
	ssize_t nr;
	while (1) {
		nr = write(fd, buf, len);
		if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
			continue;
		return nr;
	}
}

static inline int has_extension(const char *filename, const char *ext)
{
	size_t len = strlen(filename);
	size_t extlen = strlen(ext);
	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
}

/* Sane ctype - no locale, and works with signed chars */
#undef isspace
#undef isdigit
#undef isalpha
#undef isalnum
#undef tolower
#undef toupper
extern unsigned char sane_ctype[256];
#define GIT_SPACE 0x01
#define GIT_DIGIT 0x02
#define GIT_ALPHA 0x04
#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
#define isspace(x) sane_istest(x,GIT_SPACE)
#define isdigit(x) sane_istest(x,GIT_DIGIT)
#define isalpha(x) sane_istest(x,GIT_ALPHA)
#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
#define tolower(x) sane_case((unsigned char)(x), 0x20)
#define toupper(x) sane_case((unsigned char)(x), 0)

static inline int sane_case(int x, int high)
{
	if (sane_istest(x, GIT_ALPHA))
		x = (x & ~0x20) | high;
	return x;
}

#endif
Commit	Line	Data
4050c0df JH	1	#ifndef GIT_COMPAT_UTIL_H
	2	#define GIT_COMPAT_UTIL_H
	3
8f1d2e6f JH	4	#ifndef FLEX_ARRAY
	5	#if defined(__GNUC__) && (__GNUC__ < 3)
	6	#define FLEX_ARRAY 0
	7	#else
	8	#define FLEX_ARRAY /* empty */
	9	#endif
	10	#endif
	11
b4f2a6ac JH	12	#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
b4f2a6ac JH	13
4050c0df JH	14	#include <unistd.h>
	15	#include <stdio.h>
	16	#include <sys/stat.h>
	17	#include <fcntl.h>
	18	#include <stddef.h>
	19	#include <stdlib.h>
	20	#include <stdarg.h>
	21	#include <string.h>
	22	#include <errno.h>
	23	#include <limits.h>
	24	#include <sys/param.h>
	25	#include <netinet/in.h>
	26	#include <sys/types.h>
	27	#include <dirent.h>
	28
	29	#ifdef __GNUC__
	30	#define NORETURN __attribute__((__noreturn__))
	31	#else
	32	#define NORETURN
	33	#ifndef __attribute__
	34	#define __attribute__(x)
	35	#endif
	36	#endif
	37
	38	/* General helper functions */
	39	extern void usage(const char *err) NORETURN;
	40	extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
	41	extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
	42
39a3f5ea PB	43	extern void set_usage_routine(void (routine)(const char err) NORETURN);
	44	extern void set_die_routine(void (routine)(const char err, va_list params) NORETURN);
	45	extern void set_error_routine(void (routine)(const char err, va_list params));
	46
4050c0df JH	47	#ifdef NO_MMAP
	48
	49	#ifndef PROT_READ
	50	#define PROT_READ 1
	51	#define PROT_WRITE 2
	52	#define MAP_PRIVATE 1
	53	#define MAP_FAILED ((void*)-1)
	54	#endif
	55
	56	#define mmap gitfakemmap
	57	#define munmap gitfakemunmap
	58	extern void gitfakemmap(void start, size_t length, int prot , int flags, int fd, off_t offset);
	59	extern int gitfakemunmap(void *start, size_t length);
	60
	61	#else /* NO_MMAP */
	62
	63	#include <sys/mman.h>
	64
	65	#endif /* NO_MMAP */
	66
	67	#ifdef NO_SETENV
	68	#define setenv gitsetenv
	69	extern int gitsetenv(const char , const char , int);
	70	#endif
	71
731043fd JR	72	#ifdef NO_UNSETENV
	73	#define unsetenv gitunsetenv
	74	extern void gitunsetenv(const char *);
	75	#endif
	76
4050c0df JH	77	#ifdef NO_STRCASESTR
	78	#define strcasestr gitstrcasestr
	79	extern char gitstrcasestr(const char haystack, const char *needle);
	80	#endif
	81
817151e6 PE	82	#ifdef NO_STRLCPY
	83	#define strlcpy gitstrlcpy
	84	extern size_t gitstrlcpy(char , const char , size_t);
	85	#endif
	86
9befac47 SP	87	static inline char* xstrdup(const char *str)
	88	{
	89	char *ret = strdup(str);
	90	if (!ret)
	91	die("Out of memory, strdup failed");
	92	return ret;
	93	}
	94
4050c0df JH	95	static inline void *xmalloc(size_t size)
	96	{
	97	void *ret = malloc(size);
4e7a2ecc JH	98	if (!ret && !size)
4e7a2ecc JH	99	ret = malloc(1);
4050c0df JH	100	if (!ret)
4050c0df JH	101	die("Out of memory, malloc failed");
aa5481c1 JH	102	#ifdef XMALLOC_POISON
	103	memset(ret, 0xA5, size);
	104	#endif
4050c0df JH	105	return ret;
	106	}
	107
	108	static inline void xrealloc(void ptr, size_t size)
	109	{
	110	void *ret = realloc(ptr, size);
4e7a2ecc JH	111	if (!ret && !size)
4e7a2ecc JH	112	ret = realloc(ptr, 1);
4050c0df JH	113	if (!ret)
	114	die("Out of memory, realloc failed");
	115	return ret;
	116	}
	117
	118	static inline void *xcalloc(size_t nmemb, size_t size)
	119	{
	120	void *ret = calloc(nmemb, size);
4e7a2ecc JH	121	if (!ret && (!nmemb \|\| !size))
4e7a2ecc JH	122	ret = calloc(1, 1);
4050c0df JH	123	if (!ret)
	124	die("Out of memory, calloc failed");
	125	return ret;
	126	}
	127
1c15afb9 JH	128	static inline ssize_t xread(int fd, void *buf, size_t len)
	129	{
	130	ssize_t nr;
	131	while (1) {
	132	nr = read(fd, buf, len);
	133	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	134	continue;
	135	return nr;
	136	}
	137	}
	138
	139	static inline ssize_t xwrite(int fd, const void *buf, size_t len)
	140	{
	141	ssize_t nr;
	142	while (1) {
	143	nr = write(fd, buf, len);
	144	if ((nr < 0) && (errno == EAGAIN \|\| errno == EINTR))
	145	continue;
	146	return nr;
	147	}
	148	}
	149
5bb1cda5	150	static inline int has_extension(const char filename, const char ext)
83a2b841	151	{
5bb1cda5 RS	152	size_t len = strlen(filename);
5bb1cda5 RS	153	size_t extlen = strlen(ext);
83a2b841 RS	154	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
	155	}
	156
4050c0df JH	157	/* Sane ctype - no locale, and works with signed chars */
	158	#undef isspace
	159	#undef isdigit
	160	#undef isalpha
	161	#undef isalnum
	162	#undef tolower
	163	#undef toupper
	164	extern unsigned char sane_ctype[256];
	165	#define GIT_SPACE 0x01
	166	#define GIT_DIGIT 0x02
	167	#define GIT_ALPHA 0x04
	168	#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
	169	#define isspace(x) sane_istest(x,GIT_SPACE)
	170	#define isdigit(x) sane_istest(x,GIT_DIGIT)
	171	#define isalpha(x) sane_istest(x,GIT_ALPHA)
	172	#define isalnum(x) sane_istest(x,GIT_ALPHA \| GIT_DIGIT)
	173	#define tolower(x) sane_case((unsigned char)(x), 0x20)
	174	#define toupper(x) sane_case((unsigned char)(x), 0)
	175
	176	static inline int sane_case(int x, int high)
	177	{
	178	if (sane_istest(x, GIT_ALPHA))
	179	x = (x & ~0x20) \| high;
	180	return x;
	181	}
	182
	183	#endif